1311102643 has 2 divisors, whose sum is σ = 1311102644. Its totient is φ = 1311102642.

The previous prime is 1311102599. The next prime is 1311102691. The reversal of 1311102643 is 3462011131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311102643 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311102743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655551321 + 655551322.

It is an arithmetic number, because the mean of its divisors is an integer number (655551322).

Almost surely, 2^1311102643 is an apocalyptic number.

1311102643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311102643 is an equidigital number, since it uses as much as digits as its factorization.

1311102643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1311102643 is about 36209.1513708897. The cubic root of 1311102643 is about 1094.4910913329.

Adding to 1311102643 its reverse (3462011131), we get a palindrome (4773113774).

The spelling of 1311102643 in words is "one billion, three hundred eleven million, one hundred two thousand, six hundred forty-three".